Inferior frontal gyrus

Inferior frontal gyrus
Inferior frontal gyrus
	Inferior frontal gyrus of the human brain, gyrus frontalis inferior.
	Lateral surface of left hemisphere viewed from the side. Inferior frontal gyrus shown in yellow.
Details
Part of	Frontal lobe
Parts	Pars opercularis, pars triangularis, pars orbitalis
Artery	Middle cerebral
Identifiers
Latin	gyrus frontalis inferior
NeuroNames	85
NeuroLex ID	birnlex_873
TA98	A14.1.09.113; A15.2.07.058
TA2	5447
FMA	61860
	Anatomical terms of neuroanatomy

The inferior frontal gyrus (IFG), (gyrus frontalis inferior), is the lowest positioned gyrus of the frontal gyri, of the frontal lobe, and is part of the prefrontal cortex.

Its superior border is the inferior frontal sulcus (which divides it from the middle frontal gyrus), its inferior border is the lateral sulcus (which divides it from the superior temporal gyrus) and its posterior border is the inferior precentral sulcus. Above it is the middle frontal gyrus, behind it is the precentral gyrus.^[1]

The inferior frontal gyrus contains Broca's area, which is involved in language processing and speech production.

^ Nolte (2002), The Human Brain, Mosby, ISBN 978-0-323-01320-8 photos on p526 & p.546